package org.apache.maven.settings.io;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.Map;

import org.apache.maven.settings.Settings;
import org.apache.maven.settings.io.xpp3.SettingsXpp3Writer;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.util.IOUtil;
import org.codehaus.plexus.util.WriterFactory;

/**
 * Handles serialization of settings into the default textual format.
 * 
 * @author Benjamin Bentmann
 */
@Component(role = SettingsWriter.class)
public class DefaultSettingsWriter implements SettingsWriter {

  public void write(File output, Map<String, Object> options, Settings settings) throws IOException {
    if (output == null) {
      throw new IllegalArgumentException("output file missing");
    }

    if (settings == null) {
      throw new IllegalArgumentException("settings missing");
    }

    output.getParentFile().mkdirs();

    write(WriterFactory.newXmlWriter(output), options, settings);
  }

  public void write(Writer output, Map<String, Object> options, Settings settings) throws IOException {
    if (output == null) {
      throw new IllegalArgumentException("output writer missing");
    }

    if (settings == null) {
      throw new IllegalArgumentException("settings missing");
    }

    try {
      SettingsXpp3Writer w = new SettingsXpp3Writer();
      w.write(output, settings);
    } finally {
      IOUtil.close(output);
    }
  }

  public void write(OutputStream output, Map<String, Object> options, Settings settings) throws IOException {
    if (output == null) {
      throw new IllegalArgumentException("output stream missing");
    }

    if (settings == null) {
      throw new IllegalArgumentException("settings missing");
    }

    try {
      String encoding = settings.getModelEncoding();
      if (encoding == null || encoding.length() <= 0) {
        encoding = "UTF-8";
      }
      write(new OutputStreamWriter(output, encoding), options, settings);
    } finally {
      IOUtil.close(output);
    }
  }

}
